Ice Cream Sandwich Android 4.0.3 on my Samsung Galaxy S – update 2

i really like it.
if you have SGS and you want Onecosmic’s Ice Cream Sandwich Android 4.0.3 RC3.1 on your SGS, you must make first a backup, the problem is that, after, KIES will not work, i’ve saved a .vcf file with my contacts from my old 2.3.6 firmware, and then imported.
You must have installed GINGERBREAD (Android 2.3.x) at least Android 2.3.4 , clockworkmod for flashing the ROM, ICS_4.0.3.0(RC3.1)_GalaxyS_Full.zip the ROM copied on the SD card
, a kernel with custom recovery.
Good parts:
-really fast
-web download seems faster
-apps don’t block
-seems stable
Bad parts:
–2 restarts of his own no new restarts
–battery is draining faster 1 day for long use, battery last 1 day with wireless on, navigate on the web for some hours
-wireless signal seems weaker
-Maps fails to login to Google account, in background require permission for the configured google account
-i didn’t find any satellites on GPS Test app